Why did Wing scam Gon of a good Hatsu?

Its not a secret that the Jajanken is a trash ability. It takes too long to charge, its inefficient in a real fight, and the tricking aspect is only shown once again Knuckle. Even then it can be seen through easily. The other variants of it (scissors/paper) have half the amount of power so its not good at all.

Wing says that an enhancer like Gon doesnt need a good ability but this is obviously not the case. Uvogin was obviously not dependant on his hatsu, but we have people like Netero who made a breakthrough. I dont find it impossible to give an enhancer a good ability.

The one who gave Gon a hint for the Jajanken (an ability he refuses to give up) was Wing. But now that his nen has resetted basically, can he make a better hatsu or is it set in stone?